yes, the correct answer here depends on ypur level of precision
desired. It depends on whether or not you want the 172.16.0.0 to be
included. Many routing protocols auto summarize, sometimes to the
detriment of precision. I personally do not like to include routes in a
summary that are not present, put this is due to my isp experience.
Brian
On Thu, 19 Oct 2000, Daniel Cotts wrote:
> Implicit in the concept of summarization is that all possible subnets are
> included in the sumarization. A summary of 172.16.0.0/22 would include four
> subnets (172.16.0.0, 172.16.1.0, 172.16.2.0, 172.16.3.0). The first 22 bits
> of all addresses are the same. Only the last two change. (00, 01, 10, 11).
> 172.16.1.0/22 is not correct. BTW since summarization works on powers of two
> the beginning address will always be an even number.
> 172.16.0.0/22 works but does not include the first subnet. Geoff's answer
> covers only the stated subnets.
>
> > -----Original Message-----
> > From: Daniel Boutet [mailto:[EMAIL PROTECTED]]
> > Sent: Thursday, October 19, 2000 10:32 AM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Summarization
> >
> >
> > Ok, I am joining in a little late since the answer to the question is
> > complete. I was wondering Geoff why are you stating " but since the
> > 172.16.0.0 is not included" What do you mean? You've lost me.
> > The rest of your explanation is also not understood.
> > I started learning about "summarization" and I need further
> > explanation if
> > you do not mind.
> > Thanks
> >
> > Daniel
> >
> > ""A. Geoffrey Cauchi"" <[EMAIL PROTECTED]> wrote in message
> > 014001c039b8$d7037e70$[EMAIL PROTECTED]">news:014001c039b8$d7037e70$[EMAIL PROTECTED]...
> > > 172.16.1.0/22 is not correct. 172.16.0.0/22 would be the
> > correct syntax,
> > > but since the 172.16.0.0 is not included, I would aggregate these 3
> > networks
> > > as:
> > >
> > > 172.16.1.0
> > > 172.16.2.0/23
> > >
> > >
> > > Geoff
> > >
>
> >
>
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